Ever thought about updating your mobile phone!.
Ok..... i have read posts about mobiles, ipods, camera's, gps and all the other toys we like to take into the hills, but no-one yet has mentioned you could save weight and time by combining all your toys in one.
I use a sony ericsson K800 currently ,3.2 mp camera , alarm clock , mp3 , it even with a big enough memory stick will hold a movie to watch for that solo night in the bivi/tent. some are so clever now you can watch eastenders in the middle of nowhere (provided you have a signal.. but it is out there.. mostly)
something i did recently the night before doing helvelyn the next morning , and there deffinately has to be something said for a few pints in the local before trusting yourself up like a sausage on a butchers rack and settling down to a movie you have been meaning to watch and it drowns out the noise of the rave in the field next door
when you plug in the headset.
There are newer models out now such as the N95 and xmas should see an explosion of other 5mp camera handsets on the market.
As said before if your not printing to A4 plus then 3,4,5mp will do nicely, you dont have a viewfinder but a large screen and various shoot modes and digital zoom although you shouldn't overuse this as it will blur the picture, but i have several standard 7x5 shots on my walls from when i have been out with my trusty K800 and they look great.
There are some gps applications for mobiles and the N95 has one built in but the maps are for satnav but hey.... at least you make it to the car park beofre you get lost on the moor. 
There are several companies advertising in Trail that produce maps for mobile devices however you must remember most phones opperate on ASSISTED gps, ie. the phone needs to have a signal.
Most modern handsets come with the nescescary software to connect to the PC and move your "3gp" videos (get via torrents) and MP3's about and to move your photo's to the PC although i just use the memory stick in the machine in boots.
Oh............... they make phone calls to!
check out the various options but make sure you talk to someone who knows what there doing and can advise you.
I could get you all to buy from me but that would be naughty
Its a good option that has worked well for me over the years, i only ever use up one pocket on "gadgets" and i only ever worry about having one extra item on my kit list not 5! and the weight saving and not having to have 5 different items to charge or 5 different chargers in the car which only ever comes with one socket and anyone with a dodgy alternator will know plugging anything in could lead to a longer walk than planned.
most of us have phone contracts its just a matter of getting the most from the equipment and in most cases the phones are free , or at least a damn sight cheaper than buying a digital camera,mp3 ipod, mini dvd payer, alarm clock and mini tv seperately!.
last word, if your music mad on the hills or david bailey on drugs then make sure you spend the extra £30 on a spare rechargeable battery.